Keyfitz, N. (1993). "Population and
sustainable development: distinguishing fact and preference concerning the
future human population and environment." Population and Environment14(5): 441-461.

King, J. and M. Slesser (1995). "Prospects
for sustainable development: the significance of population growth."
Population and Environment16(6): 487-505.

Turner, B. L. (1990). The Earth as
transformed by human action: global and regional changes in the biosphere
over the past 300 years. Cambridge; New York, Cambridge University Press
with Clark University.